package com.nowcoder.community.controller;

import com.nowcoder.community.entity.DiscussPost;
import com.nowcoder.community.entity.Page;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.ElasticsearchService;
import com.nowcoder.community.service.LikeService;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Api(tags = "搜索模块")
@Controller
public class SearchController implements CommunityConstant {

    @Autowired
    private ElasticsearchService elasticsearchService;

    @Autowired
    private UserService userService;

    @Autowired
    private LikeService likeService;

    /**
     * 搜索 search?keyword=xxxx
     *
     * @param keyword : 关键字
     * @param page    : 分页
     * @param model   : 模块
     */
    @ApiOperation("搜索")
    @GetMapping("/search")
    public String search(String keyword, Page page, Model model) {
        // 搜索帖子
        // 返回结果类型 ：org.springframework.data.domain.Page<DiscussPost> 可迭代
        org.springframework.data.domain.Page<DiscussPost> searchResult =
                elasticsearchService.searchDiscussPost(keyword, page.getCurrent() - 1, page.getLimit());
        // 聚合数据
        List<Map<String, Object>> discussPosts = new ArrayList<>();
        if (searchResult != null) {
            for (DiscussPost post : searchResult) {
                Map<String, Object> map = new HashMap<>();
                map.put("post", post);
                // 作者
                map.put("user", userService.findUserById(post.getUserId()));
                // 点赞数量
                map.put("likeCount", likeService.findEntityLikeCount(ENTITY_TYPE_POST, post.getId()));

                discussPosts.add(map);
            }
        }
        model.addAttribute("discussPosts",discussPosts);
        // 方便页面回显搜索条件
        model.addAttribute("keyword",keyword);

        // 分页信息
        page.setPath("/search?keyword="+keyword);
        page.setRows(searchResult==null?0: (int) searchResult.getTotalElements());

        return "site/search";
    }
}
